Fixed unqualified imports in pylabplot
Cleaned up and improved tuning_curve and cyclic_tuning_curve
Slight refactoring of FeatureCurvePlotGroup code
Fixed input sheet handling for the CoordinatedPatternGenerator
Fixed GUI RF measurement coordinate access

SheetViews for RF measurements were referencing the measurement sheet
but coordinates are in the input sheet coordinates. Consequently
changed SheetView information to the input sheet.